Extensible bracelet with interchangeable elements



July 31, 1956 H. SHAHUM 2,756,560

EXTENSIBLE BRACELET WITH INTERCHANGEABLE ELEMENTS Filed Sept. 21, 1954 76 I Z 15 z; ,1?

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United States Patent EXTENSIBLE BRACELET WITH INTERCHANGE- ABLE ELEMENTS Henri Shahum, Marseille, France Application September 21, 1954, Serial No. 457,481

'1 Claim. (Cl. 59-79) The object of the invention consists of the creation of an extensible bracelet having adjustable cover plates comprising detachable elements. This arrangement enables the diameter of the bracelet to be regulated without dismantling, and the causes of accidental unhooking or jamming of the articulations to be eliminated.

It is characterised by the means employed, considered both all together and separately, and more particularly by the locking means provided with a stabilising notch embraced between two elastic jaws providing progressive clamping, the pivots constituting the articulated pinning of the extensible bars.

In the accompanying drawings, given by way of example without limitation of one of the forms of construction of the object of the invention.

Figure 1 shows the locking piece viewed in plan view,

Figure 2 shows the bar carrying the pinning pivots, in plan view,

Figure 3 shows an elevation of the arrangement of the pinning pivots and of the axial connection piece, and

Figure 4 shows a plan view of the mounting of the elements.

The locking bar 1 is constituted (Figure 1) by a plate provided at its axial part with a rocking orifice 2 and at each of its ends with an aperture 3 for the penetration of a'pivot head, extended by a constriction with locking shoulder 4, 5, a rocking aperture 6, and elasticity slots 7, 8 taken between the jaws. Notches 9, 10 are provided to receive the decorative plates.

The cross-bar 11 (Figure 2) is formed by two profiled ends 12, 13 provided with apertures 14, 15 of the same diameter as that of the notches 5, 6 intended to receive the pivots 16, 17 (Figure 3) with bottom flanges 18, 19 and overhanging heads 20, 21.

The middle part 22 forms an angle with the ends and has at its axial part an aperture 23 receiving a connecting eyelet 24. Slots with catches 25, 26 are disposed on each side of the central aperture.

The advantages and the mode of operation of this arrangement can thus be seen.

The locking piece 1 (Figure 1) is assembled by its central axial orifice 2 by means of the eye 24 to the pivot carrier bar 11. The apertures 2 and 23 are superimposed.

A spider is thus formed (Figure 4) having the arms 27, 28. The pivot 16 is engaged in the aperture 3 having the same diameter as the head 20, and then driven into the aperture 6 and locked by the shoulders 4, 5 until the cylindrical part 16 of the pivot is received in the locking device 6 of corresponding dimensions. The constrictions 4, 4 then hold it in its working position whatever traction is applied, being returned by the springs 29 which have their point of support on the catches and slots 25, 26.

' ice In the case of heavy traction, the cylindrical pivot, mounted to turn freely on itself, is locked against the jaws stabilised by the cover plates forming the frame and decoration and alternatively covering the pieces shown in Figure 1 and Figure 2.

When it is desired to remove a spider, the pivot at each end 30, 31 is brought towards the aperture 3 so as to free the head 20, 21. This locking extraction 5, 6 can be efiected only intentionally, because it is effected in the opposite direction to that of the normal extension of the bracelet.

The disadvantages currently encountered with bracelets of this type, that is to say having detachable elements, are eliminated, more particularly their accidental disengagement.

Finally, the free mounting in their orifices of the cylindrical pivots effecting a movement of rotation, accompanying the movement of translation of the adjoining surfaces, facilitates sliding and eliminates breakage, premature wear, or twisting.

Nevertheless, the shapes, dimensions, and arrangements of the various elements could vary within the limit of the equivalents, and also the materials used for their manufacture, without thereby changing the general conception of the invention which has just been described,

I claim:

An extensible bracelet comprising a series of upper link bars, and a series of lower link bars having resiliently deformable end portions, the upper link bars being disposed parallel to each other and the lower link bars being also parallel to each other and at an angle to the upper link bars according to the degree of extension of the bracelet, each upper link bar being centrally pivoted to the center of a lower link bar and pivoted at its ends to the end portions of two neighbouring lower links bars, said pivotable connection being obtained by the provision at each end of each upper link bar of a depending pivot pin having a shank terminating in a relatively larger head, and by the provision in the resiliently deformable end portion of each lower link bar of an inner first aperture of such a size as to receive the head of the pivot pin therethrough, and an outer second aperture closely adjacent to and opening from said first aperture, said second aperture being smaller than the head of the pivot pin but large enough to receive the shank of the pivot pin therein, an end slot having a width less than the width of said second aperture and extending between said second aperture and the end of the link, opposed pointed shoulders being provided between the two apertures and spaced apart less than the Width of the pivot pin, whereby for engagement of the shank of the pivot pin into the smaller aperture and for disenagement therefrom it must be forced past said shoulders.

References Cited in the file of this patent UNITED STATES PATENTS 325,221 Wright Aug. 25, 1885 1,873,270 Blazer Aug. 23, 1932 2,225,745 Kestenman Dec. 24, 1940 2,246,359 Jelinek June 17, 1941 2,249,086 MacIntosh July 15, 1941 2,255,461 Williams Sept. 9, 1941 2,285,273 Hall June 2, 1942 FOREIGN PATENTS 672,993 Germany Feb. 23, 1939 

